Preparation of amino phosphonates for carbon dioxide capture and functionalization
LE3 .A278 2021
Bachelor of Science
Phosphonates with methyl, ethyl, and phenyl substituents were prepared from phosphorus trichloride and an alcohol with the corresponding alkyl or aryl chain. Dimethyl phosphonate was synthesized with the highest yield of 86% and with the best purity. Both dimethyl and diethyl phosphonates were used in attempts to synthesize bis(2-aminoethyl) phosphonate for carbon dioxide capture. These alkyl phosphonates, characterized by 1H NMR spectroscopy, both proved successful in synthesizing new phosphorus-containing compounds when combined with 2-aminoethanol in the presence of anhydrous hydrogen chloride or heat, but no methods produced only the target bis (2-aminoethyl) phosphonate. None of the synthesized products tested were found to be capable of capturing carbon dioxide.
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